Laser Line Generator Duty-Cycle Control for Overlap Intensity
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Solution Overview
Problem
Existing laser line generators lack the ability to efficiently manage and adjust the intensity of multiple laser beams for construction layout tasks, particularly when projecting lines and dots simultaneously, leading to potential over-intensity issues at overlap points.
Innovation Solution
A laser beam generating device with multiple laser diodes that operate in various modes, adjusting duty cycles and frequencies to ensure that the combined intensity of overlapping beams does not exceed predetermined limits, using pulse-width modulation and staggered duty cycles to maintain optimal beam intensity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple laser beams are projected simultaneously for construction layout tasks, then the functionality and versatility of the device is improved, but the intensity at overlap points may exceed safety limits
Solution Approach 1:
The patent implements periodic action by using pulse-width modulation to alternately activate different laser diodes. The controller switches between first and second laser diodes in alternating time intervals, ensuring that when one diode is active, the other is inactive. This temporal separation prevents simultaneous beam overlap while maintaining the capability to project multiple beam patterns, thus resolving the contradiction between functionality and safety.
Solution Approach 2:
The patent applies dynamics by making the duty cycle of each laser diode adjustable and mode-dependent. The controller dynamically changes the duty cycle parameters based on the selected operating mode, optimizing beam intensity distribution. This dynamic adjustment allows the system to adapt beam characteristics to different operational requirements while preventing harmful intensity accumulation at overlap points.
2Illumination intensity
If the duty cycle of laser beams is increased to improve visibility, then the brightness and visibility of projected lines is improved, but the risk of over-intensity at overlap points increases
Solution Approach 1:
The system uses periodic alternating activation of laser diodes with duty cycles optimized for visibility. By switching between diodes in alternating time intervals with appropriate duty cycles, the system achieves high visibility during each active period while ensuring that the cumulative exposure at any point does not exceed safety limits.
Solution Approach 2:
The patent implements parameter changes by adjusting the duty cycle values of different laser diodes based on the selected operating mode. The controller assigns different duty cycle parameters to different diodes, optimizing visibility while preventing harmful intensity accumulation. This parameter optimization allows high visibility operation without exceeding safety thresholds at overlap points.
3Measurement precision
If different operating modes with varying duty cycles are implemented to manage beam intensity, then the precision and control of beam intensity is improved, but the device complexity increases
Solution Approach 1:
The patent applies universality by designing a single controller that manages multiple laser diodes and implements multiple operating modes. The controller universally handles duty cycle adjustment, mode selection, and intensity regulation for all diodes, consolidating control functions into one component. This multi-functional approach achieves precise intensity control without proportionally increasing overall device complexity.
Solution Approach 2:
The system uses dynamics by implementing adjustable duty cycle parameters that can be dynamically changed based on the selected operating mode. The controller dynamically optimizes the duty cycle of each laser diode according to the operational requirements, providing precise intensity control adaptability while maintaining a manageable control architecture through software-based parameter management.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device effectively manages beam intensity, preventing over-intensity at overlap points while maintaining high visibility and accuracy for construction layout tasks, ensuring safety and precision.
Implementation Method 1
a first laser diode, the first laser diode operable to generate a visible first output beam which projects outside of the housing onto a surface; and a second laser diode, the second laser diode operable to generate a visible second output beam
Data Source
AI summary
A laser beam generating device includes a housing a first laser diode which generates a visible first output beam which projects outside of the housing onto a surface and a second laser diode which generates a visible second output beam which projects outside of the housing onto the surface. The laser beam generating device has a first mode in which the first laser diode and the second laser diode are both on. In the first mode, the first laser diode is operated at a first duty cycle the second laser diode is operated at a second duty cycle. The first duty cycle and the second duty cycle are staggered.